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12.
The Concept
Block is
broadcast to
every party in
the network
Youssef
wants to send
Tanguy some
money
1st Block is
created online
and represents
the transaction
Those in the
network
approve the
transaction and
validate it
Block is added to the
chain which provides
permanent
nonrepudiable and
transparent record of
the transaction
Tanguy
receives the
money from
Youssef

23.
Ethical and regulatory issues
● How decentralised can a blockchain be to function in our
centralised regulated society?
● Example: intervention of Swiss jurists after the The DAO hack
● Towards government legal records secured on a blockchain
https://news.bitcoin.com/worlds-top-10-bitcoin-friendly-countries/
● The future of lawyers, notaries and lawmakers
https://itunes.apple.com/fr/podcast/la-blockchain-va-t-elle-r%C3%A9volutionner-le-droit/id1150055692?i=1000377215258&mt=2

33.
Ripple
● For moving and trading value globally
● Even works with two unlike assets and in non-liquid markets
● Low cost, very high security, record time
● Serves primarily financial institutions
● All about TRUST
● No proof-of-work

46.
HyperLedger
● Five projects : Fabric, Iroha, Sawtooth, Burrow, Indy
● Fabric is the most used one for developing blockchain based
applications
● Open-source as everything from Linux
● Allows components such as consensus to be plug-and-play
Source: https://www.hyperledger.org/about

47.
How about groups like AWS?
● AWS annouced partnership with Digital Currency Group (DCG)
in May 2016 to research on a possible intgration
● In turn, DCG announced in May 2017 DCG connect dcg.co
● Updates are coming in very fast
● Race to who is the quickest
● https://azure.microsoft.com/fr-fr/blog/the-microsoft-vision-for-
accelerating-enterprise-blockchain-development/

53.
Broad Topics
● ICOs
● IoT security
● Towards a suppression of notaries and lawyers?
● Many BC companies will advertise themselves as a gain of
efficiency in record keeping (e.g. asset transactions) thanks to
the decentralised property of BC. BUT this implies everyone
using the same platform

54.
The DAO: rise and fall More info here (FR)
The mother of all DAOs
● Initiated by Slock.it an active community on the Ethereum blockchain
● Mid-May 2016 biggest crowdfunding in history 4 weeks over 120M$
● 17th June 50M$+ is hacked through a fault in open source code
● Ethereum community votes on a hard fork to save sunken boat and go
back to blocks before launch of The DAO
● Creation of ETH and ETC
● Fragile confidence in DAOs but still a promising field